John w



.11. W. AYMAH, JR

RESILIENT HEEL Filed sent. 27 1920 Dec. 4 1923..

Fetented lt-ee. d? 19.23

i i M o in it r. .i i by ai l le' Application filed September 2*?,

To al( fin/7mm "it 11mg/ concern.'

Be it known that l? JOHN W. wenn? Flr., a Citizen et the United States7 and resident et the borough ot' ll/lanhattan, city., county9 and lltate et llew liorlrj have invented eertain new and nsei'iul Improvements in Resilient lleels. ot which the following); a snecication A This invention relates to resilient heels and more partir-,ularly to the type known hall' heels, or lifts made of rubber or other similar resilient material. lilore partienlarly, also7 the invention relates to that type oi lifts generallt7 kni'iwn as concave-Convex lifts.

Heretoore. ithas been `proposed to pio vide a concave-convex litt in which the concave surface is spherical. the lift being; formed from a hollow sphere by cutting,` it along; a line corresponding` to the outline et a heel. The marginal et ges oit the attaching" tace of a concave-convex litt as thus produced are curved :treni the rear edge of the lift to the breast corners and also be tween the breast corners. This particular litt has. certain disadvantages Which prevent it frein being; completely satisfactory.

@ne et these disadvantages is that While such a litt enables a tisht eontaetto be obtained between the lit and the shoe heel along the marginal edges ot the lift, the li'lt cannet be broiurlit into close engageineiit with the shoe heel at other portions of ite attaching; tane. due to the dii'liculty oi flattening its spherieally curved con-ave atlafliing' tace to a plane surface. Since the attaching` 'faces of these l` s are of a spherical curvature with the nealr at snbstantially the center et the litt, .in order to bring the entire attaching tace el ,the litt into contact with the shoe heel? it would be necessary to flatten ares et circles extending in all directions treni the centralv nealtot the litt to its inarrtfin. lt is impossible to tlatten such aires even`approximately7 Without drivlingg the attaching nails .closer together than co'nnnereially practicable in a heel litt. .litri/f" in'iprifed heel, on the other hand.I is 'tornied to'present an attaching` tace hai/'ingr its marginal edge arranged in a plane, and hating' an outline such that when the litt is liattened against a shoe heel. its niffnginal edge 'troni the rear edge te the breast e rners will be substantially concentric er symmetrical With the outline of the heel.

Serial. llo. lil-,030.

llitliin its niargvfinal edge, the atte nri'wefl. litt @instantly udinzilli et the lie" substantially to v"he trensversi of!" the litt tion in V ha a different cur :is all these ,.nrr;.ture.=s are translenegitudinffrl Center line ot the litt and as the lonn'itneinnl cnrratnre ot the litt is slijl\t the nails that are applied will readilj-yv llatten outthe transverse curratnres.

This and other ieatures ot niv intention Will be helieina'tter Afurther described. sliorf'n in the drawings and linally pointed ont in 'the claim:

Figure l shows a 'perspective viewv et nijq improved litt 1with the deepest point at tl e central part of the breast line.

Figure 2 shows a. diagrammatic View. iii-- dieatinf; the central longitudinal curvature along` the line 2*2 of Figure l.

Figrnrc 3 .is a transverse vertical sertion taken en the line 3 3 oit Figure l.

Figure 4t is a diagrammatic View7 showing` tbe relation of the center point et the :ittacliing 'face to the rear edge and the central peint oi the breast edge et the lit't.

`Figure 5 is also diagrammatic View. showing` the breast clnvature et the litt.

Figure 6 is a View similar to Figrnie o'f a inodiiied torni ot litt. l

Similar characters ot reference indicate corresponding parte throughout the \f:.n.'i w.'-y Views.

Referring to the drain/ing and niore nar-- tienlarb;T to Firure the line -e indi fates the marginal edge oi the atteebinir face or the litt. rFreni a noint 0 which is the center et lonk..itudinal enrvatnre oit the attaching; tace9 an are is shown extendrem e to the peint li line owf/ is shown drawn tangential to the are c-,(/ :ind extending iter a distance equal to about one fourth or ene fifth ot the length ou'2 the are e--y/, and the end et this line ternieat atthe point 57 on the lneast edge et li't,

nia the Thetann'ent line {gf-gf is shown at les to the radins oi? curvature gno. n line is shown extending trein the Vpoint o to the horizontal line e-e and pei'neudieular to the line c-e termine with the radius line omg en angrgle alpha.

The broken line naw-g? in Figure 2 repre-- sente the tread face of the lift, the portions which the line face.

ahy) and 'infn of such face being pref-Y erably parallel t the arc c g' ai .l tangential portion g-gy respectively of the upper attaching face of the lift. The curved lines (/e/ and 7er-a are cont-inuaticns of the arcs c'-g and ,vr-a and ind :te what the contour of the attaching and tread faces of the lift would be, if the longi `idinal cnrvature of the rear portions of such faces was continued to the breast edge of the lift.

As l) stated, the depths of transverse cross sections throughA the lift progressively increase from the rear edge of the lift to the breast line so that each has the deepest point of its attaching face at the central point of the breast line of the lift. Hence, when nails are applied and the lift is flattenerh the curvesl corresponding to transverse sections of the lift are flattened and will bring' about tight joint at the marginal edge of the lift with the marginal edge of the heel, trom the rear edge to the breast corners thereof.

In Figure 4, the line cZ-c-' represents the `longitudinal center line, the line a indicates the plane of the marginal edge. The line b passes through the center point c of the attaching face of a lift such as is shown in Figs. l and 2. It will be apparent from Fig. 4 that the attaching face of the lift eX- tends below the central point c on the line Z) to the point f which is the deepest point of the concave face of the lift. In Fig. 5, the points e5, e5 are at the breast edges of the lift, and the curvature of the line (z5-fg@ corresponds with the curvature of the breast line of the lift. It will be understood, of course, that Figs. i and 5 only indicate in diagrammatic form the relative positions of the parts referred to with reference to the lines a and 7). In a practical lift, the curvature more nearly approximates that shown in Fig. 3.

By reference to Fig. 5 of the drawing it will be noted that a relativelj.7 deep transverse are is obtained along thebreast line of the lift, and, therefore, when this arc is flattened into a straight line against the heel face, a maximum tensional pressure of the side marginal edges of the lift at the breast vagainst the heel face will be obtained.

In Figure 6 I have shown a modified form of the invention, in which the arc extending longitudinally of the attaching face of the lift is denoted by the line c3-e4, and in extending from 0 to e4 is perpendicular to the line @3V-e5 which represents the marginal edge of the .attaching In thismodification, the tangential portion (a4- c6 extends for only a relatively short distance beyond the curved portion eS-e of the attaching face of the lift. In the form of lift shown in Fig. 6 as well as in that shown in Fig. 2, the depth at points on the longitudinal center line of the lift increases toward its breast edge.

My improved lift is made of rubber or other similar resilient material, and subv stantially the entire lift is made of this resilient material, the thickness of the lift being that usually employed in lifts of this kind, such as is indicated in Figs. 1 and 3. Any well known practical means for :ittacln ing the lifts to the leather heels of shoes be readily provided, and as this forms no part of the invention it is not shown in the drawing.

Lifts constructed in acrordance with my invention have proved satisfactory in that they may be readily applied, and when the fastenings have been inserted and the lifts thereby attached to the heels, a very tight Contact is secured along the marginal edge of the attaching face of the lift, extendingl from the rear end of the lift to its breast corners along the sides of the lift. Moreover, where lifts are made in standard sizes and these are applied to heels and are cut ofi or trimmed to conform to the exact size of the heels, the trimming line being substantially concentric with the outline of the lift. Consequently, the lift when trimmed has exactly the same structural elements that the initial lift had, namely, a longitudinal center line and trans\ferse curvatures progressively increasing in depth from the rear end to the breast edge of the lift. the same structural elements cooperating together in exactly the same way, after the lift is trimmed.

I have described several embodiments of my invention but do not wish to be confinedv to details thereof, the spirit of my invention being defined in the appended claim.

I. claim:

A resilient top-lift for :i shoe heel of substantially uniform thickness and resilieney throughout and havingr a concave attaching face provided with a marginal attachingr edge of heel shape and arranged in aI plane, the longitudinal central line of the attaching face progressively increasing in depth from the rear edge of the lift to the breast line thereof in respect to the plane of the heel-shaped edge of the lift. the deepest point of the attaching face beingT at the center of the breast line, and the attaching face of the lift at any point in the length of ther lift having a transverse curvature ,describing a single continuous arc.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

, JOHN W. AYMAR, JR.

Witnesses:

WALDEMAR F. TIMME, ALMA DUFFY. 

